Defense Finance and Accounting Service – Whitehall, OH – . Specialized Experience for the GS-06 is defined as: Applying knowledge of accounting systems, policies and procedures for the examination, verification and maintenance of accounts and financial data; validating, monitoring and maintaining financial transactions and records; researching discrepancies and making adjustments. GS-05 Time-in-Grade: Current or former federal employees who have held a GS position in the preceding 52 weeks, must meet the time in grade requirement. Applicant must have served 52…